If you're using a springform pan, you need to wrap it with heavy duty foil, not regular foil. Regular foil is too narrow and will leave seams where the water will leak through. Heavy duty foil is wider than regular foil, and you can wrap it around the pan without any seams. Otherwise, just use a regular cake pan, not a springform, and line it with parchment. Butter the pan first, line with parchment, then butter the parchment. Dust with cocoa powder or flour - Cocoa powder is preferable when making a chocolate cake.

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"Strength is the capacity to break a chocolate bar into four pieces with your bare hands - and then eat just one of the pieces."